Pontiac rear-end with 6:14 (or 6:11's) yielding 8600 rpm in the lights. Pulled wheels in 2 & 3rd as well. At this time we ran Chevy 327 (.16 over), close ratio B/W 4 speed, hilborns, Hays 60 lb billet flywheel. Ladder bars ran to rear engine mounts. Crazy times. Loved Lions due to the sea level and beach air.